electric current and magnetism - Category wise Question and Answer Practice Test with Solutions

Question : 6

Inverter converts

a) direct current into alternating current

b) current at low voltage to current at high voltage

c) alternating current into direct current

d) None of these

Question : 7 [BPSC (Pre) 2000]

Turbines and Dyanamos are used to convert which energy to electrical energy?

a) Mechanical energy

b) Chemical energy

c) Solar energy

d) Magnetic energy

Question : 8

The resistance of a thin wire in comparison of a thick wire of the same material

a) is equal

b) depends upon the metal of the wire

c) is low

d) is high

Question : 9 [UPPCS (Pre) 2011]

Which of the following metals is used as filament in lighting bulbs?

a) Silver

b) Iron

c) Molybdenum

d) Tungsten

Question : 10

Which one of the following heater element is used in electric press?

a) Nichrome wire

b) Lead wire

c) Copper wire

d) Iron wire